Table 3.
Self-reported 7-day smoking abstinence per intervention by follow-up method in percentages for the UCSF/SFGH Internet stop smoking trial (2005–2007)
| UCSF/SFGH IWHRC Internet smoking cessation trial |
||||
| Condition |
Guía |
Guía + ITEMs |
Guía + ITEMs + MM |
Guía + ITEMs + MM + VG |
| Follow-up point | Observed |
|||
| 1-Month total | 22.5 | 27.0 | 21.7 | 22.2 |
| Automated | 14.7 | 17.4 | 14.1 | 12.3 |
| Live | 7.9 | 9.6 | 7.6 | 9.9 |
| 3-Month total | 24.1 | 29.0 | 23.0 | 26.1 |
| Automated | 17.1 | 17.4 | 14.5 | 17.0 |
| Live | 7.1 | 11.6 | 8.6 | 9.2 |
| 6-Month total | 25.7 | 29.0 | 26.1 | 23.7 |
| Automated | 22.1 | 21.4 | 18.8 | 15.6 |
| Live | 3.6 | 7.6 | 7.2 | 8.1 |
| 12-Month total | 28.3 | 28.2 | 30.1 | 34.3 |
| Automated | 18.5 | 12.9 | 14.5 | 16.3 |
| Live | 9.8 | 15.3 | 15.6 | 18.1 |
| Missing = smoking | ||||
| 1-Month total | 17.4 | 19.1 | 15.9 | 15.1 |
| Automated | 11.3 | 12.4 | 10.4 | 8.3 |
| Live | 6.0 | 6.8 | 5.6 | 6.7 |
| 3-Month total | 16.6 | 17.9 | 13.9 | 15.9 |
| Automated | 11.7 | 10.8 | 8.7 | 10.3 |
| Live | 4.8 | 7.1 | 5.2 | 5.6 |
| 6-Month total | 14.5 | 16.7 | 14.3 | 12.7 |
| Automated | 12.5 | 12.3 | 10.3 | 8.3 |
| Live | 2.0 | 4.3 | 3.9 | 4.4 |
| 12-Month total | 19.8 | 19.1 | 20.7 | 22.7 |
| Automated | 12.9 | 8.7 | 9.9 | 10.7 |
| Live | 6.9 | 10.3 | 10.7 | 11.9 |
Note. Seven day abstinence was defined as a “no” answer to: “Have you smoked 1 or more cigarettes in the past 7 days?” Automated and live follow-up figures do not always add up to the total because of rounding. UCSF = University of California, San Francisco; SFGH = San Francisco General Hospital; IWHRC = Internet World Health Research Center. Automated follow-ups were done via programmed E-mail reminders (up to three) to return to the site at 1, 3, 6, and 12 months after initial quit date. Live follow-ups consisted of phone calls by blinded interviewers if participants did not respond to the automated E-mail after 7 days. Observed rates were calculated as the number reporting 7-day abstinence divided by the number of participants who responded at each follow-up point. Missing = smoking rates were calculated as the number reporting 7-day abstinence divided by the total number of participants assigned to the condition. Guía refers to the smoking cessation guide. ITEMs refer to Individually Timed Education Messages, that is, E-mails reminding participants to return to the site and read specific sections of the materials selected according to their quit date. MM (mood management) refers to an eight-session MM intervention designed to help participants regulate their mood to increase the likelihood of quitting. VG (virtual group) refers to an asynchronous bulletin board that allowed participants to interact and provide each other with information and encouragement.